Attractive women are 'hit' by this particularly hard - all those guys trying to get them to bed, get another score, the curve is exponential with beauty. Women usually hit on guys they like with much more subtlety, and stop when told directly immediately. Men, often not so much, even these days.
One of my ex-gf (pretty, smart, rich, very hard working commodity trader) told me on a bad day its about 30 unknown guys who try to strike conversation out of blue, 'go to coffee', etc. She was so tired of this since she saw every possible pick up line, every situation they tried to create, every expensive cocktail sent her way.
Its extremely hard for women to not get spoiled by such constant attack, imagine this constantly from teen years, it drills into your personality.
Those who persist despite this are really awesome, driven and very strong internally, or broken beyond repair in some way. My ex was a mix of both. Good luck to her wherever she ended up.
Yes, its mostly fault of us guys, even if only all those before you.